Stairway



I, W. HOD GSGN. STAIRWAY.

APPLICATlON FILED JUNE 11, 1949.

1,412,406. Patented Apr. 11, 1922 2 SHEETS-SHEET 1.

I. W. HODGSON.

STAIRWAY.

APPLICATION man JUNE 11, 1919.

. 1,412,40 Patented Apr. 11, 1922. I

2 SHEETS-SHEET Z.

Z711) enr 7 5 44 7677 IEMG' W. HObGSON, OF PHILADELPHIA, P

ENNSYLVANIA, ASSIGNOR OF DREW Ti) M. J. HODONNELL, 0F PHILADELQP EA, PENNSYLVANIA.

STMRWAY.

Application filed June 11,

To call whom it may concern.

Be it known that I, ISAAC W. HooosoN, a

citizen of'the- United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented new and useful Improvements'in Stairways, of which the following is a specification.

My invention. relates to a new and useful improvement in steirways, andhas for its oeject to so arrange and consiruct stairs that a secondary trend is producedbys cont nuotion of either the primary trend or the riser, and the secondary tread being of less width than the primary trend and in a higher plane thus providingfor the completion of each tread by filling in with c'e ment or other suitable material.

A further object of my invention is to utilize the secondary tread us a n0n-slip seclzion.

A still furtherobject of my inventionis in form a primary trend, :1 riser and a secondory tread us one unit so constructed that these units may be readily secured together and attached to the stringer to produce the completed stairway.

'"With these ends in view. this invention consists in the details of and combination of elements hereinafter set forth and then specifically designated by the claim.

In order that those skilled in the art. to which this invention appertains. may understand how to. make and use the same, I will describe its construction in do ail, re-

numeriils to the accompanying forming av part of this application, in which v F i, is u verticel section of :1. portion of a stairway showing one portion therein completed and other portions in different or" assembly.

Fig. 2, is a side elevation of one of the motel units from which the stairway is constructed. y

3, is a bottom plan view of a p rtion thereof being broken away.

Fig. i. is e front elevation of Fig. 2.

Fig. 5, is bottom plan of one of the cou- Fig: 2,

.pimg; members.

e. is a side view of Fig. 5.

7, is a view similar to Fig. 1 of a sli htly modified form of my invention.

big-8., is a detail View of one of the units of -which the stairway shown in Fig. 7

is composed, and

bpeclflcation cl Letters Patent.

' partially cut from secured to the stringers.

' together and giving added Patented Apr. 11; 192%. 1919. Serial 170.3%,299.

Fig. 9, is a, section at the line 9-9 of f n carrying out my invention as embodied in Figs. 1 to 6 inclusive. 1 represents one of the side stringers of a stairway which is in the form of an angle iron, and 2 represents one of the units of which the n composed and each of these units consists of a primary trend 3, a riser 4 a.second:iry tread 5 and brackets 63, the brackets being hereshown as being formed from tongues the riser and bent inward ion horizontal position. There may be two or more of these brackets as occasion may rc uirc.

Jll 7 and 8 may be formed with the primary tread 3 and the secondary tread 5 respectively to serve as anchors forthe cement or other material when applied to the metal work.

in constructing u stairway from nnumher or these units 2 one of said units is first secured upon the stringers by suitable bolts 9-und lhe next unit likewise being secured upon said stringers in such manner as to bring the prii'nary tread thercof on top of the brackets (l of the first unit. This primary treud is secured to the brackets and stringer by the coupling members 10 by pussing the threaded shank ll of each of said couplingmcmbers through u suitable hole in the primary tread downward through one slot 12 "'1 one of the brackets and then slidingsaid coupling member in the direction of the length of the slot until the threaded shank iilpusses through one of the holes 14 formedin the stringers. when by running it nut upon the threaded shank 13 andu nut 15 upon the threaded shank 11 the two units will not only be coupled to ether but rigidly y continuing this process the proper number of units may be secured upon the stringers and coupled together to' produce the stairwuyefter which the filling 16 consisting of cement or other suitable material may i be applied to the trends, and where the filling consists of cement it is poured. upon each tread and flows nnden ihe secondarytreud locking the parts strength and rigidity to the completedstructure.

he openings 17 formed in the risers by the inturning of the brackets 6 may be closed by shields lil held in place by the nuts 15.

stairway is are preferably staggered relative to'ea'chtion isutilized for erecting metal stairways The secondary treads 5 have-a series of slots 19 formed therethrough, which slots other, ,and-inthese slots are set plugs'20 of any suitable non-slippingmaterial, thus givina to the stairway a non-slipping quality. When these plugs become worn theymay be removed by digging them out of theirsockets and others may be substituted there for. 7

From the foregoing it will be seen that an exceedingly simple and effective construc- %nd the material for which may be entirely tread 5 is formed by a continuation of the primary tread mstead'of a continuation ofthe riser 4'.

right angles to the latter and the secondary WhiIe iny improv'en'ient is especially adapted for the utilization of sheet metal in the construction of stairways,i-t is obvious that the unitsmight be cast or other wise formed.

Of course I do not wish to be limited to the exact details of construction as herein shown, as these may be varied within thei,

limits of the-appended claim without departing from the spirit of my invention.

Ha lng thus fully described my invention, what I claim as new and useful is In a stair construction, a -unit formedfrom a single sheet of metal so bent as to produce a primary tread, a riser projecting from one or the rear edge thereof, a bracket projecting from the upper end of the riser in a direction opposite to the primary tread and a perforated secondary tread projecting from-the opposite front edgeof the primary tread and overlying thesame in parallel spaced relation thereto, the perforationsin said secondary tread adapted to hold suit+ able non-slipping-devices.

In testimony whereof, I have hereunto aflixed my signature.

Isaac W. HODGSON. 

